Cascadianjiggle:
I started off only liking fat women, but that changed as I got older and more self confident. Secure in my self image, I had a whole new world open to me.
The idea of, "what if the fat was on me instead of her," as childish as it may seem, was what made me loosen my habits.
My experience was the same... I started out as a thin guy who loved fat girls. It wasn't until much later, when I put on a little weight myself (accidentally), that it occurred that I could enjoy being fat.
Time/age/experience/whatever has opened my eyes to sooo much. Wish I knew all this when I was 25!